Flexible shaft and method of making same



C. H. VEEDER. FLEXIBLE SHAFT AND METHOD OF MAKING SAME. APPLICATION FILED' FEB. 1'6, 192:.

1,421, Pa te11ted Ju1y4,1922.

INVENTIN? BY I ML manufacture of coiled that is flexible shafts more coils of wire wound .closely about a IT-ED STAT-E oURTIs nUssEY VEEDER, or HARTFORD, COMPANY, or HAR MANUFACTURING CONNECTICUT.

CONNECTICUT, ASSIGNQR TO THE VEEDER Trosn, CONNECTICUT, A CORPORATION or rLE'xI aLnsHAFT AND METHOD or MAKING SAME.

Application filed February To all whom it may concem:

Be it known that. I, CURTIS HUSSEY YEEDER, a citizen of the United States, residing in the city of Hartford, in the State of Connecticut, have invented certain new and a useful Improvements in Flexible Shafts and Methods of Making Same, of which the following is a specification, reference being had to the accompanying drawing, forming a art hereof. Y

his invention relatesparticularly to the core.

The uncoiling or the opening .ofthe coils of such shafts is commonly prevented" I by the application of solder to the shaft for a short distance from the extremity.' As the a shaft still retains its cylindrical form driving engagement between the shaft and the coacting member is commonly efl'ectedby a solid tip secured tothe end of'the shaft and 7 provided with a key or spline or slotted at its end. 'It is the object of this invention to lmprove the manufacture of such shafts so as to afford greater security against unwindlygonal form.- (preferably square),

additional security against the uncoiling or;

opening of the coils of the shaft is obtained and at the same time the end portion of the shaft is given a form which assures driving engagement with the coacting "member; Preferably the tube isdouble'th length re-' uired for each terminal portion and is sipped upon the shaft to an intermediate point before swaging, so that,after swaging, the shaft and tube can be cut at-the middle point o-f'the length of the tube and the two ends of the shaft thus'secured at one opera-' tion. It is generally desirable tofill with.

solder the coils of the shaft to be covered before the tube is placed, but the swaging may suffice if the inner' -as well as the outer coils of wire are distorted so as 'toprevent unooiling. The invention W111 be morefully Specification of Letters Patent. v

wire, 'flexible shafts, which have one or 16, 1921. Serial to. 445,333;

explained with'reference to the accompanying drawing in which it is illustrated and in which 4 1 F'igure 1 is a view in side elevation of a short length of coiled wire, flexible shaft to be secured-against uncoiling. A e

Figure 2 is a perspective view of a short len hof tube tobe employed. f igure. 3 is a view in side elevation showmg t e tube applied to the shaft. I

i re 4 is a view similar ,to Figure 3,

but s owing the shaft and tube mg.

5 'is a view' similar to Figure 4,

'shaft after it has been cut. I Figure 6 is an endview of the shaft termlnal shown in Figure'5.

after swag- .Pa'tented July 4,1922) but showing one terminal portion of the The coiled wire, flexible shaft a may be of any usual construction, except as to 1ts terminals as hereinafter explained The'shaft is shown in the dra'win as havmg a core a of longitudinal wires an two concentric coils .a? and a wound closely aboutthe core. Such shafting and is cut off in lengths desired for use, solder being applied to the terminal portions to prevent the uncoiling or' opening of the coils. In accordance with 'thepresent invention, however, there is provided a s eeve or tube '6, preferably of suflicient length to.

form two terminals, and this tube is slipped upon the shafting a to a point where it will cover the cut to be made, the tube fitting'the shafting rather closely. When the tube has been placed as desired, the .tube and the .shafting within it as far" as itsconstruction permits) are swagedto a form polygonal in cross section, preferably square, as shown in Figures, 5 and 6, and thereafter the'tube,

and shafting are cut acrossto form two separate terminals.- For the a better body for swaging, and certainly preventing the'uncoiling of the inner toils, solder, as indicated at c in Figure 6, may applied to the shafting where it is to be'covered before the tube is slip ed into place.

It will be seen thatin or er to secure driv- 'ing engagement with the coactingmember .ber be formed with a socket to receive the polygonal terminal of the shaft.

I claim as my invention: -v

is' usually formed in long'lengths The improvement in the manufacture purpose of giving v it is; only necessary that the meeting memi f coiled wire flexible h'afts which consists 1n placing on the sha fting a; closely fitting tube and thereafter swaglng the tube and the shafting to polygonel form.

2. The improvement 1n the manufacture in applying solder to the shaftin then placing on the shefting a closely tting' tube, and finally swaging the tube and the shafting to polygonal form.

-3. The improvement-in the manufacture of coiled wire flexible shafts which consists in placing on the shafting 'a, l s l tube Qswegin gthe tube end the shafting to poliygonal form, and finally cutting the tube 15 an of coiled wireflexibleshafts which consists 7 end shafting at a pint between the ends of the tube. 4. As a new article of manufacture, a, coilediwire, flexible-shaft having 11 'n" itsnal form.

Februe 'y A D. 1921;

v VEEDER.

portion a'tube swaged upon the s afting 20 together- 'with the shafting itself to polygo- 4 

